Pulley construction



May 1, 1934. E. F. MCKINNEY 1,957,029

PULLEY CONSTRUCTION Filed Oct. 15, 1952 Edward EfflcKi/mgy INVENTOR ATTORNEYS Patented May 1, 1934 stares PATENT oice EULLEY CONSTRUCTION Edward F. McKinney, Morris, 111. Application October 15, 1932, Serial No. 638,023 3 Claims. (Cl. 16211) My invention relates to improvements in pulbodying a modified form of my invention, certain ley constructions of the type used with windows. portions thereof being broken away and shown in In constructing certain types of overhead pulsection, and leys for use with windows, it has been the prac- Figure 8 is a fragmentary end elevation of the tice heretofore, when by reason of the nature of pulley shown in Figure '7. 60 the pulleys use, the wheel housing could not have In carrying out my invention I make use of a an opening in it sufficiently large to permit the window frame 11 which comprises in part, side wheel to be positioned therein, to cast or otherportions 13 and 15 and alintel portion 17. A winwise form the housing in two sections, which when dow 19 is slidably positioned between the side porif) assembled. were oppositely positioned with respect tions 13 and 15. The above mentioned structure 65 to each other and thereby provided a housing split forms no part of my invention and has been delongitudinally and vertically. scribed merely for the purpose of clearly disclos- The disadvantages of this construction are ing the nature of my invention. manifold. In the first place, it is very difficult to A pulley 21 is associated with the window frame '15 form the two sections by standard methods of and comprises a pulley housing 23 having a pair 79 4o specification and accompanying drawing, wherein so that it may fit snugly therebetween. 95

.45 ticned at the left in Figure 1. oppositely extending with respect to each other.

manufacturing so that the sections when assemof spaced apart side portions 25, a base portion bled will inter-fi satisfactorily. The completed 27, a projecting base portion 29, and an end wall housing which is made up of the two sections, by portion 31. The housing is preferably made from reason of this difficultyin manufacturing, has an cast iron, the side portions, base portion, prozo unfinished and unworkmanlike appearance which jecting base portion and end wall portion being 75 is highly undesirable. integral.

Secondly, when the housing is made up of the The side portions 25 are provided with aligned sections as described, it has been extremely diffiopenings 33 therein for receiving an axle 35 on cult to drill the holes for receiving the shaft on which one or more wheels 37, positioned between 25 which the pulley wheel is mounted so that the the side portions, are mounted. Each of the holes will be in alignment in the assembled houswheels is provided with circumferential recesses ing. By reason of the holes being out of align- 39 for receiving a window cord or chain 41. The ment, the pulley wheel may be prevented from axle is provided with head portions 43 for being rotating freely, thereby causing unnecessary fricconnected with the side portions.

30 tion between the chain and the pulley wheel, with Means for closing the space between the side the attendant wearing of the same. portions 25 of the housing, through which the An object of my invention is to overcome the .wheel is positioned within the housing, comprises several above-mentioned disadvantages and to an elongated plate member 45 positioned between provide novel means whereby the wheel may be the side portions and substantially conforming 35 mounted in the housing without providing a split longitudinally to the peripheral contour of that 90 housing. section of the side portions between which it is Other objects relate to various features of condisposed. struction and arrangement of parts which will be The plate member is b n i lly equal in apparent from a consi ration of the following width to the distance between the side portions 25 Figure 1 shows two types of pulleys embodying The plate member 45 has each end portion my invention as mounted overhead in a Window thereof prov With a P 0f laterally e ndframe. ing projecting portions 4! and 49 respectively,

Figure 2 is a top plan view of the pulley posiwhich are positioned on opposite sides thereof and Figure 3 is a top plan view of the other pulley The projecting portions 47 and 49 extend outpositioned at the right in Figure 1. wardly from the plate member a' distance sub- Figure 4 is a vertical sectional view taken substant a y qua to the thickness of the id p rstantially along the line l& of Figure 1. tions 25, and are receivable in cut out portions Figure 5 is an enlarged detail sectional view 0 notches 51 and 53 respectively- The p fll' t- 05 taken substantially along the line 5-5 of Figing portions 47 and 49 are provided with inclined ure 1. faces or edges 55 and 57 respectively for engage- Figure 6 is a top plan view of the cover plate ment with complementary inclined faces or edges portion of my invention, 59 and 61 respectively of the notches 51 and 53.

5 Figure '7 is an elevational view of a pulley em- The plate member 45 is further provided with a pair of laterally extending lug portions 63, which are positioned on opposite sides thereof adjacent the projecting portions 49, and are receivable in recesses 65 in the side portions 25.

In assembling the pulley, the wheel 37 is first positioned between the side portions 25 of the housing, so that the shaft opening therethrough is in alignment with the openings 33 in the side portions 25.

The projecting portions 47 of the cover por tion 25, are then positioned in the recesses 51 so that the angular portions 67 thereof are positioned in the corresponding angular portions of the notches 51. The projecting portions 49 are then moved into the notches 53. As the projecting portions 49 are moved into the notches 53, the lugs 63 will cause the side portions 25 to be sprung apart, thereby permitting the lugs 63 to move into the recesses 65 with a snap action for connecting the plate member with the side portions.

The pulley wheel 37 is then positioned so that the axle opening therethrough will be aligned with the openings 33 in the side portions. The axle 35 positioned within the aligned openings is provided with head portions 43 which not only connect the axle with the side portions 25, but also prevent the side portions from being sprung apart and thereby securely locking the plate member with the side portions.

The pulley 69 shown in Figure l is a different style of pulley embodying my invention, but as all of the salient features of the pulley 69 correspond to those described in connection with the pulley 21, the reference characters are made common to both pulleys.

The pulleys are adapted for being connected with the window frame in the manner shown in Figure 1.

In Figure '7 I have illustrated a modified form of my invention. In this form of the-invention, the cover plate 71 is preferably of uniform width throughout its length, which width is substantially the distance between the side plates '73. The projecting portions 47 and 49 and the lugs 63 are dispensed with and in lieu thereof the end portions of the cover plate are provided with threaded openings 75 therein for receiving screws 77 which extend through openings in the side portions '73 for connecting the cover plate '71 with the side portions.

The cover plate '71 is shown as being provided with an extending or cord guide portion 79 having an opening 81 therethrough, through which a chain or cord, extending over the pulley from another pulley, may extend. The cord guide portion '79 is adapted for confining and preventing a chain or cord positioned above the pulley, from whipping and striking the pulley and thereby creating a noise.

It will be noted that the cover plate, particularly when it has a guide portion associated therewith, may be made of a different material from that of which the pulley housing is constructed. When the housing is made of cast iron, the cover plate and guide portion may be made of brass, thereby reducing to a minimum any noise resulting from the chain or cord engaging the guide portion or cover plate.

While I have illustrated and described the preferred embodiment of my invention, it will be understood that various modifications and changes may be made without departing from the spirit or scope of the invention.

I claim:

1. A pulley comprising a housing provided with a pair of spaced apart walls, a wheel therebetween supported by the same, the upper portions of said walls extending above said wheels, a closure plate for said wall portions having laterally extending ends adapted to engage the edges of said wall portions and an intermediate section adapted to be disposed between said walls, and cooperating lugs and sockets in said plate and wall portions adapted to be pressed into engagement with a snap action for detachably holding said plate in position.

2. A pulley comprising a housing having a pair of spaced Walls for supporting a wheel therebetween and having portions extending beyond the periphery of said wheel, said wall portions having a pair of opposed notches in the edges thereof, a detachable cover plate for said wall portions having a pair of lateral extensions adjacent one end thereof pivotally receivable within said notches, and cooperating means on the edges of said plate adjacent the other end thereof and on the inner faces of said wall portions for retaining said cover in position.

3. A pulley comprising a housing having a pair of spaced walls for supporting a wheel therebetween and having portions extending beyond the periphery of said wheel, said wall portions having a pair of opposed notches in the edges thereof, a detachable cover plate for said wall portions ha ing a pair of lateral extensions adjacent one end thereof pivotally receivable within said notches, and cooperating means on the edges of said plate adjacent the other end thereof and on the inner faces of said wall portions for retaining said cover in position, said means comprising a pair of lugs and a pair of sockets for receiving the same with a snap action.

EDWARD F. MCKINNEY. 

